Rake construction for mcdougall furnaces.



No. 825519. A PATENTED JULY 10, 1906. 4

G. s. CEOUSB.

RAKE GONSTRUCTION POR MODOUGALL FURNAGES.

APPLICATION FILED JAN. 24.1906.

2 SHEETS-SHEET 2.

W/TNESSES INVENTOI? GEORGE S. CROUSE, OF' GREAT FALLS, MONTANA.

RAKE CONSTRUCTION FOR MODOUGALL FURNACES.

Specification of Letters Patent.

Patented July 10, 1906.

Application filed January 24,1906. Serial No. 297.711.

To all whom it may concern:

Be it known that I, GEORGE S. CROUSE, a resident of Great Falls, in thecounty of Cascade and State of Montana, have invented certain new anduseful Improvements in Rake Construction for McDougall Furnaces; and Ido hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to 'which it appertains to make and use the same.

My invention relates to improvements in rake Construction for McDougallfurnaces, the object of the invention being to provide improved meansfor attaching the rakes or blades to the arms, which consists ofimproved split boxes or frames held together on the arms by the rakes orblades; and the invention consists in certain novel features ofConstruction and combinations and arrangements of parts, as will be morefully hereinafter described, and pointed out in the claims.

In the acconpanyng drawings, Figure 1 is a View in vertical section of aMcDougall furnace illustrating my improvements; and Figs. 2, 3, 4, and 5are enlarged detail views of my improved rake and its split-frameattachment.

1 represents a McDougall furnace, and 2 represents the arms of a rotaryframe carrying my improved rakes or blades 3. The arms 2 are made withside flanges or ribs 4 to receive the grooved or angle side aprons 5 offrames 6 and support the latter, and pins 7 are located in alinedopenings in aprons 5 and flanges 4 to prevent any longitudinal movementof the frames 6 on arms 2, said pins 7 being preferably made 'with headsat their upper ends to limit their downward movement. Each frame 6 ismade n two halfsections having registering configuration or juncture'which may be in the form of a diagonal compound curve, as illustrated,or might be otherwise shaped, and each section is made with a dovetailedopen-end housing 8, which aline 'When together to receive a tenon 9 onthe upper end of the blade or rake 3. The tenon 9 is long enough to fillboth housings 8 and cross the point of juncture of the framesections,thereby holding them together on the arm, and the interior of thehousings is on a bevel to receive the similarly beveled or inclinedtenon 9 and permit the parts to tightly wedge together. The housings arepreferably strengthened by webs 11, as shown, and may be located at anyangle to suit conditions, some frames having their housings located atan angle opposite to the others, so that the rakes of the different armsmay move the material to the center of the furnacechambers and others tothe outside, as is the case with furnaces of this type. By thisarrangement of parts it 'Will be seen that any blade, regardless of itsposition on the arm, can be removed without disturbing the other blades,and such parts of the frame or blade as may be damaged can be thrownaway and new parts used to replace them, and the frame and blade can bere laced on the arm at any point thereof witfiout moving any other frameor blade.

A great many slight changes might be made in the general form andarrangement of the parts described without departing from my invention,and hence I do not restrict myself to the precise details set forth, butconsider myself at liberty to make such slight changes and alterationsas fairly fall within the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. In a device of the character described, the combination of a splitframe and a rake or blade attached to alining faces of the parts of saidsplit frame and Operating to maintain the attachment of said frame to arake-arm and prevent movement of the arts of said split frame relativelyto each ot ler.

2. In a device of the character described, the combination of a splitframe constructed to be inserted on a rake-arm, and a rake or bladehaving a tenon to secure the frame-sections together on the arm and therakeor blade thereto.

3. In a device of the character described, the combination of a splitframe having angle-aprons at its sides to fit over flanges of arake-arm, dovetailed alined housings on the frame, a rake or blade, anda tenon on the rake or blade to enter the alined housings, secure theframe-sections together on the arm and the rake thereto. e

4. In a device of the character described, the combination of a splitframe having angle-aprons at its sides to fit over flanges of a'rahe-arm, dovetailed alined housings on the frame-sections, a rake orblade, and a tenon on one end thereof to enter the alined housings, andsaid tenon and the housings made inclined or wedge-shape to wedge theparts together.

IOO

5. In a device of the character described, the combination With arake-arm having side fianges, of split frames having angleaprons attheir edges to receive the side fianges of the arm, pins in alinedopenings or notches in the frame-fianges and aprons, alined dov'etailedhousings on the hame-sections, a rake or blade, and a tenon thereon tofit into the alined housings.

6. In a device of the character described, the combination of twoseparable members having diagonal abuttng edges and each member havingmeans to engage a rake-arm, ora rake or blade having a head disposed atright angles to the dividing-line of the two members and extendingacross said dividinging witnesses.

GEORGE S. CROUSE. W tnesses:

S. RAY SWEENEY, EWALD HAUsEN.

